vmstat -d testsuite will fail if your /proc/diskstats is present
but zero length. While this seems buggy behaviour from lxcfs, its
there and its a simple matter to test for it and skip those tests
if we are run on a zero length /proc/diskstats system.
testsuite would fail if /proc/vmstat was unreadable.
Issue #3 brought up by Mike Frysinger.
test script explicitly checks to see if it is readable and
sets these tests to unsupported if not.
Before this commit, the test checking `vmstat -m` (slabinfo) output uses
a fairly strict regular expression that only allows alphanumeric
characters and a few exceptions such as "_", "-", "(" and ")".
However, recent kernels use a wider range of characters, such as ">".
For instance, see this Linux commit which creates a "page->ptl" slab:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/mm/memory.c?id=b35f1819acd9243a3ff7ad25b1fa8bd6bfe80fb2#n4283
Other patches for reporting slab usage per memcg include the names of
the cgroup in the slabinfo output, which can include additional
characters and use dots for abbreviation.
The check should not be so string, instead it could simply look for a
chain of non-whitespace characters and that should be enough.
Tested that `make check` is still working, including in some of the
environments where features that enable the additional slabinfo names.
Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Craig Small <csmall@enc.com.au>
vmstat -p checks used to fail on systems with odd
partition tables, including some Debian buildd servers.
This change limits what sort of test partitions are used,
otherwise the test is skipped.
There probably are other valid partitions, these can be added
later, if known.
vmstat -d or vmstat -p would crash mysteriously under different
circumstances. The problem was eventually tracked down to /sys not
being mounted which meant is_disk() always returned false.
The partition would then be attempted to be linked to a non-existent
disk causing a segfault.
vmstat will now not link to a disk if none exists.
The change in testing will skip those tests when /sys/block doesn't
exist.
Many thanks to Daniel Schepler for his analysis and suggestions.
Bug-Debian: http://bugs.debian.org/736628
The pwdx check expected error message, which where in use for only
short period of time. The old message was put in place in commit
9d47cb0c38
The vmstat issue was triggered by 'sr0' cdrom device, which gives
following unexpected output. Fix simply ignores partitions which has
zero activity. Besides such partitions probably would not apply as
good candidate of -p option anyway.
$ vmstat -p sr0
Partition was not found
Reported-By: Moritz Muehlenhoff <jmm@debian.org>
Bug-Debian: http://bugs.debian.org/656508
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The dejagnu tests for slabtop are skipped when "/proc/slabinfo" is
unreadable due to permissions. This commit provides the same check
for vmstat under its -m (slabinfo) option.
Makefile will now only test for Linux systems, a work around in the
makefile due to some silly redefine restrictions.
uptime and w now won't error due to being one user logged in, thanks to
Sami for the patch
kill processes by pid test commented out due to false negatives
pwdx process 1 check also commented out due to false negatives
